Compare two Maps in Scala

Question

Is there any pre-defined function that I can use to compare two Maps based on the key and give me the difference? Right now, I iterate Map1 and foreach key, I check if there is

Answer 1

Try:

val diff = (m1.keySet -- m2.keySet) ++ (m2.keySet -- m1.keySet)

diff contains the elements that are in m1 and not in m2 and that are in m2 and not in m1.